Should the booster shot be the same as the first two shots?

Should the booster shot be the same as the first two shots?

> The FDA has authorized three vaccine boosters — Pfizer-BioNTech, Moderna and Janssen/Johnson & Johnson — and determined that it is safe for individuals to receive a COVID-19 vaccine booster or additional dose that is a different brand than the initial dose or doses. Jan 28, 2022

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